This place is called Taman Tasik Metropolitan.
It is about 4 km, not much hilly on the main route, just some slopes. There are toilets in between, but you have to pay.
Direction to go there ?
Coming from Bandar Utama, head towards Kepong and then head towards the round about of Jalan Ipoh, it is that big lake on your right side. You just need to make a U-Turn back and immediately after Shell petrol station, slow down and take the first left turn.
Make use of Google Map Malaysia.